Grinding apparatus.



No. 821,621. PATENTED MAY 29, 1906.

M. DUNN.

GRINDING APPARATUS. APPLICATION FILED $313.6. 1905.

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No. 821,621. PATBNTED MAY 29, 1906. M. DUNN.

GRINDING APPARATUS.

APPLICATION FILED IBB.6,1905.

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No. 821,621. v I I PATENTED MAY 29, 1906. M. DUNN.

GRINDING APPARATUS.

APPLICATION FILED rzs.e.19os.

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PATENTED MAY 29, 1906;

M. DUNN. GRINDING APPARATUS. APPLIOAVJVLION FILED PEB.6,1906.

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No. 821,621. PATENTED MAY 29, 1906. MHDUNN.

GRINDIN APPARATUS.

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INVENTOR mrZacLDann ATTORNEYS No. 821,621. PATENTED MAY 29, 1906.

M. DUNN.

GRINDING APPARATUS.

APPLICATION FILED PEB.6,1905.

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UNITED STATES PATENT OFFICE.

GRINDING APPARATUS- Specification of Letters Patent.

Patented May 29, 1906.

Application filed February 6, 1905. Serial No. 244,295-

To call whom, it may concern.-

Be it known that I, MICHAEL DUNN, a citi- Zen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have inventedcertain new and useful Improvements in Grinding Apparatuses, of which the following is a specification.

This invention relates to a new and useful improvement in grinding apparatuses, and more especially to an apparatus for grinding the tires of locomotive and car wheels.

The more essential object of the invention is to produce an apparatus comprising one or more machines for grinding the tires of locomotive and car wheels without removing the wheels or axles from the locomotive or car by simply jacking up or supporting the locomotive or car so that its wheels are relieved of its weight and held in juxtaposition to the grinding machine or machines.

Another feature resides in the provision of a grinding-machine capable of various adjustments, so that its grinding-wheel may be brought to bear upon the tire at the proper oint.

Still another feature resides in the construction and arrangement of the parts whereby the apparatus is disposed in the pit over which it is customary to support the locomotive or car when the same is being repaired or the tires ground.

Finally, the object of the invention is to provide an apparatus of the character described that will be strong, durable, eflicient, and comparatively inexpensive and simple to make and one whose parts will not be liable to get out of working order.

With the above and other objects in view the invention consists of the novel details of construction and operation, a preferable embodiment of which is described in the speciiication and illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of one of the grinding-machines employed in my apparatus, showing the continuous track upon which the machine or machines are mounted in section. Fig. 2 is an end elevation of the machine shown in Fig. 1. Fig. 3 is a plan view of the machine. Fig. 4 is a transverse vertical sectional view taken on the line a: a: of Fig. 2. Fig. 5 is a horizontal sectional View taken on the line 'y 'y of Fig. 1. Fig. 6 is a vertical sectional view of one of the grindingwheels employed and its component parts, showing a portion of the flanged wheel in engagement therewith. Fig. 7 is a vertical sectional view of another form of grindingwheel. Fig. 8 is a side elevation of my grinding apparatus, showing a plurality of machines connected to be simultaneously driven and the driving-wheels of a locomotive in engagement with the machines, the pit in which the apparatus is disposed being also illustrated in section; and Fig. 9 is a plan view of the parts shown in Fig. 8[

It is apparent that while the invention more especially resides in an apparatus for rinding tires without removing the wheels from their bearings, the apparatus necessarily comprises a plurality of grinding-machines, which must be constructed so as to accomplish, in connection with the apparatus, the desired result. However, it is obvious that various styles of machines may be employed, it only being necessary to a successful operation that the machine or machines be adjustable and arranged so that different forms of grinding-wheels ma be readily applied thereto. In view of t ese facts it is to be understood that the invention is not to be limited to the exact form of machine shown, and the machine illustrated is merely set forth as a preferable construction.

In the drawings, the numeral 1 designates an ordinary pit, such as is common in carshops. Arranged longitudinally of the pit and at each side thereof, so as to lie under the wheels when the same are supported over the pit, are channel-rails 2, formed on each side with dovetailed flanges 3, adapted to fit in the dovetailed grooves 4, formed on the under side of the machine-standards 5 of the machine 6. As many machines 6 are arranged upon the channel-rails 2 at each side of the pit as are desired, according to the character of work to be done. In the drawings in Figs. 8 and 9 four machines on each channel-rail have been shown, one for each Wheel. It is apparent, however, that a greater or less number of machines may be employed, but that there should be at least one machine to each wheel. In the majority of instances the wheels may be simultaneously ground. It is preferable to drive the wheels 7 by a suitable motor or engine (not shown) and to arrange on one of the axles 8 an ordinary split sprocket or band wheel 9, which may be suitably connected with the engine or motor, so as to impart motion to the wheels through their connecting-links 10. A'suitable steadying device to offset the impulse of each wheel as its counterbalance passes over its center should be employed, so that the tires may be evenly ground. I

In order that a clear understanding of the ap aratus may be had, one of the machines Wil now be described, it being understood that the machines all having the same construction a description of one will suffice for the others.

The standard 5, previously mentioned,being mounted on the channel-rail 2 and having its dovetailed grooves 4 in contact with the dovetailed flanges 3, it is apparent that the standard, and thus the machine, is adjustable longitudinally on the channel-rail 2. For the purpose of holding the standard in its adjusted position a set-screw 11 is provided at the lower end of the standard, so as to impinge one of the dovetailed flanges 3 when it is tightened. The standard 5 is formed with a transverse web 12, which is provided upon one side with a vertical dovetailed rib 13, on which is disposedablock 14, formed with a horizontal web portion 15, which is provided with a bearing-collar 16, through which loosely passes a vertical screw 17 Keyed upon the screw and disposed slightly above the upper surface of the web portion 15 is a worm-gear 18, which is held in position by a set-collar 19, fastened to the screw and impinging the gear. The screw 17 is threaded through a collar 20, projecting from the under side of the base of the standard 5, and it is apparent that by revolving the worm-gear 18 the screw 17 will be turned and the block 14 raised or lowered. For the purpose of rotating the worm-gear 18 I mount upon the block 14 a transverse shaft 21, carrying a worm 22 which engages with the worm-gear 18 at one side. The shaft 21 is suitably supported in bearing-boxes 23. It is obvious that by turning the shaft 21 motion will be imparted to the worm-gear 18 and screw 17. Set-screws 24 are .provided on the side and to the rear of the block, so as to impinge the side of the dovetailed rib 13 for the purpose of locking the block in its adjusted position. The block 14 is formed on its upper surface with a horizontal dovetailed table 25, which extends transversely of the block and at substantially right angles to the channel-rail 2.

Mounted on the table 25 are a pair of bearing-heads 26 and 27, constructed so that they may be adjusted longitudinally of the table and transversely of the standard or machine. The table 25 is formed at one end with an apertured lug 28*, which supports the outer end of a headed screw 29, which is held in position by a set-collar 30, abutting the lug 28 The screw at its inner end is threaded through the bearing-head 26, so that upon revolving -the screw the said bearing-head may be moved longitudinally of the table and transversely of the machine. Arranged on the lower side of each bearing-head are set=screws 31, adapted to impinge the dovetailed ortion of the table 25 for the purpose of 100 ing the bearing-heads in position after they have been adjusted. A mandrel or shaft 28 is rotatably supported in the bearing-heads 26 and 27 and is held against displacement at one end by a set-collar 32, which abuts the bearing-head 27 and at its opposite end by the arbor or hub 33, which abuts the forward bearinghead 26. The bearing-heads are generally spaced apart a sufficient distance to allow the mandrel 28 to receive one or more pulleys 34, which are suitably driven for imparting motion to the said mandrel 28, as will hereinafter be described.

Various forms of grinding-wheels may be mounted upon the mandrel 28, and the hub 33 may be constructed in any suitable manner so as to firmly hold the wheel and its parts rigidly upon the shaft, so as to cause the said wheel to turn therewith. In Figs. 1, 2, 3, and 4 is shown the solid grindingwheel 35, which is adapted to grind the tread and a portion of the flange, while in Fig. 6 is shown a grinding-wheel 36, formed of three layers or sections a, b, and c, the peripheries of which are shaped to grind the entire periphery of the tire or wheel. Between each of the layers a, b, and c it is preferable to arrange metallic liners d and e, which strengthen and add to the efficiency of the grindingwheel. In Fig. 7 is shown still an other form of solid grinding-wheel 37 which is adapted to grind the tread and the heel of the wheel or tire. It is apparent that various forms of grinding-wheels may be used and that they may be mounted upon shafts or mandrels in succession, so that each wheel will grind a certain portion of the periphery of the tire, although, as hereinbefore set forth, a single grinding-wheel, as that shown in Fig. 6, can be used.

The operation of the machine has been pretty well brought out; but it might be here mentioned that after the locomotive or car has been run over the pit 1 and properlyjacked up, so that its wheels stand over the machine 6, the grinding-wheel of each machine is brought to bear on the tire directly under the center of the wheel, as shown in Fig. 8. It is apparent that the grindingwheel may be readily positioned by means of the longitudinal adjustment of the machine on the channeled rail 2 and the transverse adjustment of the bearing-head 26. The pressure of the grinding-wheel on the tire may be regulated by the vertical adjustment of the screw 17, and when the various adjustments have been made the parts may be locked in position by the various set-screws 11, 24, and 31. It is obvious that each machine may be inde-.

ground at one operation will effect the longitudinal adjustment of the machines and that they will have to be moved nearer together or farther apart.

For the purpose of simultaneously driving the grinding-wheels a shaft 38, carrying a driving-pulley 39, may be suitably supported across the pit and connected with a suitable motor or engine. Upon the shaft 38 and in linewith the machines is arranged at each side two fixed pulleys 40 and 41, as shown in Fig. 9. From the pulleys 40 and 41 belts 42 extend in opposite directions and engage one of the pulleys 34 of the two nearest machines, and from the other pulley 34 on each machine extend second belts 43 which engage one of the pulleys 34 on the next adjacent machines. It is apparent that any number of machines may be connected up this way on each side of the pit and will be simultaneously driven from the shaft 38. It is also to be understood that any other suitable driving means may be used in lieu of the belts and pulleys.

As previously set forth, the wheels 7 being slowly rotated and the grinding-wheels bearing on the peripheries thereof and being simultaneously driven, the tires of the locomotive or car wheels may be readily and expeditiously ground in a short time and at a great saving of expense and labor.

Much stress is laid on the arrangement of the machines on the rails 2 in the pit. By so disposing the machines they are protected and at the same time out of the way. Also one man in the pit may readily control and adjust the machines and their parts.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

An apparatus for grinding the metallic tires of wheels comprising a plurality of grinding machines-arranged to be simultaneously operated, each comprising a standard, a grinding-wheel carried by the standard, means for adjusting the grinding wheel vertically, means for adjusting the grinding-wheel transversely on the standard, and means for adjusting the standard longitudinally.

In testimony whereof I afifix my signature in presence of two witnesses.

- MICHAEL DUNN, Witnesses:

A. L. PHELPS, M. B. SoHLEY. 

